This model has a hinged back with exposure guide. The camera could be used with Rolleikin I to use 35mm film & with the special glass plate film adapter. The following parts of his model can be modernized to 1955 standard: waist level finder, larger focusing knob, double exposure safety lock, viewing lens bayonet, X-sync contact.

Also useable after modifications: Rolleimarin I under water housing, Rolleimeter, Rolleiflash.